During which time the adolescent girls should take special care of personal hygiene ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Menstrual Cycle**: The menstrual cycle is a natural biological process that occurs in adolescent girls, typically starting between the ages of 9 and 16. It involves the shedding of the uterine lining, which results in menstrual bleeding.

2. **Importance of Personal Hygiene**: During menstruation, the body releases blood, which can create a warm and moist environment. This environment can attract pathogens (harmful microorganisms).

3. **Risks of Poor Hygiene**: If personal hygiene is not maintained during this time, it can lead to various health issues such as rashes, irritation, and urinary tract infections (UTIs). These problems can arise due to the multiplication of pathogens in the menstrual blood.

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